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Windows CVE-2026-23567

MEDIUM
Heap-based Buffer Overflow (CWE-122)
2026-01-29 psirt@teamviewer.com
Windows Buffer Overflow Denial Of Service Heap Overflow Integer Overflow Digital Employee Experience
6.5
CVSS 3.1
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CVSS VectorNVD

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector
Adjacent
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

Lifecycle Timeline

2
Analysis Generated
Mar 12, 2026 - 22:00 vuln.today
CVE Published
Jan 29, 2026 - 09:16 nvd
MEDIUM 6.5

DescriptionNVD

An integer underflow in the UDP command handler of the TeamViewer DEX Client (former 1E Client) - Content Distribution Service (NomadBranch.exe) prior version 26.1 for Windows allows an adjacent network attacker to trigger a heap-based buffer overflow and cause a denial-of-service (service crash) via specially crafted UDP packets.

AnalysisAI

Denial-of-service in TeamViewer DEX Client versions prior to 26.1 allows adjacent network attackers to crash the NomadBranch.exe service by sending specially crafted UDP packets that trigger a heap buffer overflow. The vulnerability stems from an integer underflow in the UDP command handler that can be exploited without authentication or user interaction. …

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CVE-2026-23567 vulnerability details – vuln.today
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